Bright decorative molded articles and molded articles located in the beam path of radar device

Abstract

This invention provides a bright decorative molded article exhibiting a bright color, and particularly a gold color tone. Also, this invention provides a molded article located in the beam path of a radar device that allows only a small radio transmission loss. This bright decorative molded article comprises: an opaque resin substrate; a light-emitting device provided thereon; a transparent resin layer covering the substrate and the light-emitting device; a bright decorative layer (upper surface layer) covering the light-emitting device on the transparent resin layer; and a bright decorative layer (lower surface layer) provided on the surface of the substrate at a portion covered by the bright decorative layer (upper surface layer). Alternatively, a bright decorative molded article comprises: an opaque resin substrate; a light-emitting device provided thereon; a transparent resin layer covering the substrate and the light-emitting device; and a bright decorative layer (lower surface layer) covering part of the surface of the substrate.

Description

TECHNICAL FIELD [0001] The present invention relates to variously colored bright decorative molded articles. More particularly, the present invention relates to bright decorative molded articles that are located in the beam path of a radar device mounted behind the front grille of an automobile for the purpose of protecting such radar device. BACKGROUND ART [0002] A bright decorative molded article, which comprises an opaque substrate, a bright decorative layer of indium, tin, tin alloy, or the like formed on the surface thereof, and a transparent resin layer covering the bright decorative layer, has been known. Such molded article develops silver color tone from the material that constitutes a bright decorative layer. Accordingly, molded articles with other color tones have been needed, and those with gold color tone have been needed, especially for luxury automobiles. In general, a thin metal layer with a gold metallic color tone that is used for bright decorative components, such...

AI Technical Summary

Benefits of technology

[0016] In the present invention, a light-emitting device is not particularly limited, and light emitting diodes (LEDs) are preferable from the viewpoint of their ability to emit light of a specific wavelength, their small sizes, and their low power consumption. When LEDs emit orange light, a bright decorative layer develops a gold color tone when the LEDs are turned on, and it develops a silver color tone when the LEDs are turned off. Thus, consumer needs are satisfied. If LEDs emitting light of a different color are mounted instead of orange light-emitting LEDs, a bright decorative molded article with a color tone other than gold can be obtained. Further, use of LEDs capable of emitting red-green-blue (RGB) light enables formation of bright decorative articles of several tens of thousands of colors that are controlled at different emission intensities.

[0017] Further, the second aspect of the present invention relates to a molded article located in the beam path of the radar device comprising the aforementioned bright decorative molded article. The automobile front emblem or the radar front cover decorated with the molded article according to the present invention does not only improve the design via a gold color tone. Such emblem or cover also would not impede radar function.

[0019] In the present invention, an opaque resin layer has the effect of enhancing the color tone.

[0020] The present invention provides a bright decorative molded article exhibiting a bright color, and particularly a gold color tone, via specific structure composed of a bright decorative layer (upper surface layer), a bright decorative layer (lower surface layer), and a light-emitting device. Also, the present invention provides a molded article located in the beam path of the radar device that allows only a small radio transmission loss.

Problems solved by technology

Thus, it does not satisfy needs for various color tones.

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